Company Restructuring (Details 2) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($)
Restructuring Reserve
Balance as of December 31, 2016	$ 2
Expense incurred	64
Adjustments to liability	4
Payments applied against liability	(31)
Balance as of September 30, 2017	31
Employee costs
Restructuring Reserve
Balance as of December 31, 2016	0
Expense incurred	46
Adjustments to liability	4
Payments applied against liability	(24)
Balance as of September 30, 2017	18
Cumulative amount incurred to date for active programs	101
Exit costs
Restructuring Reserve
Balance as of December 31, 2016	2
Expense incurred	18
Adjustments to liability	0
Payments applied against liability	(7)
Balance as of September 30, 2017	13
Cumulative amount incurred to date for active programs	$ 80